Mention two ways by which energy is lost from the trophic levels in the ecosystem.

Important Questions on Our Environment

HARD

10th CBSE

IMPORTANT

Science Textbook of Competency Based Questions for Class X>Chapter 15 - Our Environment>Exercise>Q 18

A lot of harmful chemicals enter our body through different sources like food. Since human beings are at top of the food chain/ trophic structure, maximum concentration of these chemicals is found in human beings. What is this phenomenon known as?

MEDIUM

10th CBSE

IMPORTANT

Science Textbook of Competency Based Questions for Class X>Chapter 15 - Our Environment>Exercise>Q 20

Lions have no known natural predators.
Based on energy transfer in a food chain, what could be the most likely reason for the above statement?

MEDIUM

10th CBSE

IMPORTANT

Science Textbook of Competency Based Questions for Class X>Chapter 15 - Our Environment>Exercise>Q 21

Which of the following belonging to a food chain is likely to have maximum concentration of harmful chemicals in its body?

MEDIUM

10th CBSE

IMPORTANT

Science Textbook of Competency Based Questions for Class X>Chapter 15 - Our Environment>Exercise>Q 22

A food chain comprises of a cat, seed-eating bird, plants, and dog. The organism which will have the maximum concentration of harmful pesticides coming through the food chain is most likely to be:

MEDIUM

10th CBSE

IMPORTANT

Science Textbook of Competency Based Questions for Class X>Chapter 15 - Our Environment>Exercise>Q 23

In aquatic food-chains, the microscopic organisms involved are

MEDIUM

10th CBSE

IMPORTANT

Science Textbook of Competency Based Questions for Class X>Chapter 15 - Our Environment>Exercise>Q 24

If the energy transferred to a tertiary consumer in a food chain is